"People are feeling relaxed; they're feeling relieved,” Black said. “They're feeling re-energized and we will see more and more of that each day."

At District One’s roll call, Isaac told officers they'll be supported, that there will be clear channels of communication and that he believes in them.

He was joined by his command staff. Assistant Chief Dave Bailey and Capt. Doug Wiesman both expressed relief about the change at the top, suggesting there would be an improved line of communication now.

Asked about that, Isaac offered, "Well, we trust each other."

He, Bailey and Wiesman came up together through the ranks of the department, acknowledging they don’t always agree but that they are unified at the end.

"What happened yesterday, in my opinion, had to happen,” Bailey said. “You know, every day that went by we were just getting further behind."

"He's already so ahead of the game on what needs to be done because he's lived through it. He's been through these awful times. He knows what the concerns are from the top,” Harrell said.

When asked if a better tone within the department translates to improved safety on the streets, the new interim chief did not hesitate.

"Absolutely. I think it's the same for any employee. When you feel positive and you feel supported, you do a better job. And I think police officers are human, too, and it translates the same,” Isaac said.

He told roll call officers he wants to stay connected and remain in tune with their concerns on patrol. He told them they could count on a unified command.

Commanders met late Wednesday after the tension of change at the top was over.

“Everybody in the room had a smile on their face and was ready to get to work,” Wiesman said. “That command team, that leadership team that's going to report to him is ready to go. It was a sigh of relief yesterday."

Isaac is getting a grade of A for atmosphere, but he also has a full plate in front of him.

"The three of us do need to immediately get back to work and restructure,” Bailey said. “I mean, that has to start immediately."